Autopilot for Jet Boats: Steering Interface

How jet boat steering differs

A jet boat is powered by a water jet instead of a propeller. Steering is done by a nozzle at the stern that directs the water jet. This nozzle is controlled by the helm, and the autopilot must move that nozzle to steer the boat.

The steering system on a jet boat can be hydraulic, mechanical, or electronic. The autopilot drive unit must match that system. The drive unit is the part that interfaces with the vessel's steering system, as described on the Raymarine drive units page.

Because the nozzle is the steering mechanism, the autopilot does not need a rudder or outboard to turn. The drive unit moves the nozzle, just as it would move a rudder or outboard on another boat. This means the same drive types that work for other boats can work for jet boats, as long as the connection to the steering system is correct.

For a detailed explanation of drive types, see our article on drive types.

Drive types for jet boats

The drive unit is the part of the autopilot that connects to the steering. For jet boats, the drive type depends on the steering system.

If your jet boat has hydraulic steering, a hydraulic pump drive is the common choice. Raymarine lists hydraulic pump drives for boats with hydraulic steering, and Furuno offers NavPilot packs with hydraulic pumps. You can compare hydraulic autopilots in our hydraulic autopilot guide.

If your jet boat has mechanical steering, a linear or rotary drive might be used. Raymarine lists linear and rotary drives for mechanical steering systems. These drives are also used on many other boats, so the selection process is similar.

If your jet boat has electronic or drive-by-wire steering, you need a special autopilot pack. Raymarine lists an EV-DBW Pilot for boats with digital drive-by-wire steering systems, and Furuno offers packs for Yamaha Helm Master and SeaStar Optimus systems. See our steer-by-wire guide for more.

To understand the difference between complete packs and core packs, read our complete pack vs core pack article.

Nozzle control explained

Nozzle control is how the autopilot moves the steering nozzle. The drive unit does this. There is no separate nozzle control part in an autopilot system.

The drive unit attaches to the steering system, and when the autopilot commands a turn, the drive unit moves the nozzle. The rudder reference or feedback unit tells the autopilot where the nozzle is pointed. Some autopilots, like Furuno's NavPilot with Fantum Feedback, do not require a physical rudder feedback unit for outboard installations. This is a software feature that uses time-based rudder gain instead of rudder angle. This can simplify installation on some boats.

For jet boats, the same principle applies. The autopilot needs to know the nozzle position, either from a feedback unit or from a software feature. The type of feedback depends on the autopilot model and the steering system.

If you are comparing autopilots, pay attention to whether a rudder reference unit is included or required. This is often stated in the pack description. You can learn more about sensor requirements in our sensor requirements article.

Electronic steering systems

Some jet boats have electronic steering, also called drive-by-wire. In these systems, the helm sends a signal to a computer that controls the steering. The autopilot must interface with that computer.

Raymarine offers the EV-DBW Pilot for boats with digital drive-by-wire steering systems. This pack is designed to work with such systems. Furuno offers NavPilot packs for Yamaha Helm Master and SeaStar Optimus systems. These are electronic steering systems used on some boats.

If your jet boat has electronic steering, you need an autopilot pack that is designed for it. A standard hydraulic or mechanical autopilot will not work. The pack title usually names the steering system, such as "EV-DBW" or "Helm Master."

When comparing packs, look for the steering system name in the title or description. The maker's page is the source for compatibility. You can also ask a dealer.

For more on how autopilots integrate with chartplotters and networks, see our integration article.

Checking your steering type

Before choosing an autopilot, you need to know what steering system your jet boat has. The Raymarine drive units page says to consult an authorized dealer if you are not sure how to determine the steering system.

You can also check the boat's manual or contact the boat builder. The steering system is usually described in the manual.

Once you know the steering type, you can match it to the autopilot drive. The autopilot pack listings on this site state the drive type, so you can filter by that. For example, the complete autopilot packs guide lists packs with their drive types.

If you plan to keep an existing drive, you might be looking for a core pack. The core pack guide explains what a core pack includes and how to choose one.

The steering type also determines whether you need a control head sold separately. See our control head options article for details.

What to look for in a listing

When you read an autopilot listing for a jet boat, look for the steering system and drive type. The title often says "hydraulic" or "drive-by-wire." The bullet list may mention the drive unit and whether a control head is included.

Check if the pack includes the drive, the control head, and the sensor. Some packs are complete, meaning they include everything. Others are core packs, meaning they omit the drive or the control head. You can learn about pack contents in our complete pack vs custom article.

Also look for whether a rudder reference unit is included. Some autopilots use software instead, like Furuno's Fantum Feedback. The listing or the maker's page will state this.

If a detail is missing, such as the drive type or whether the control head is included, that is information to ask the seller or dealer about. The maker's page is the final source for compatibility.

Questions before buying

Before you buy, ask yourself and the seller these questions:

What steering system does my jet boat have: hydraulic, mechanical, or electronic?

What drive unit does the autopilot pack include, and does it match my steering?

Is a control head included, or do I need to buy one separately?

Is a rudder reference unit required or included?

Does the pack include the heading sensor, or do I need a compatible NMEA 2000 heading source?

Is the autopilot designed for the specific electronic steering system on my boat, such as Helm Master or Optimus?

The answers will guide you to the right pack. You can also compare packs in our marine autopilot reviews.

Remember that an autopilot is an aid, not a replacement for a lookout. The U.S. Coast Guard's Boating Safety page emphasizes the importance of safe boating practices. Always keep watch and follow navigation rules.

What to pick for your situation

Questions

Can any autopilot work on a jet boat?

No. The autopilot drive must match the steering system. Jet boats with hydraulic steering need a hydraulic pump drive. Jet boats with electronic steering need a steer-by-wire autopilot.

What is nozzle control in an autopilot?

Nozzle control is how the autopilot moves the steering nozzle. The drive unit does this. There is no separate nozzle control part.

Do I need a rudder reference unit for a jet boat?

It depends on the autopilot. Some autopilots, like Furuno's NavPilot with Fantum Feedback, do not require a physical rudder feedback unit. Others do. Check the autopilot's requirements.

What if my jet boat has drive-by-wire steering?

You need an autopilot pack designed for drive-by-wire systems. Raymarine offers the EV-DBW Pilot, and Furuno offers packs for Yamaha Helm Master and SeaStar Optimus.

Can I install an autopilot myself on a jet boat?

Installation requires knowledge of your steering system and electrical wiring. Many boat owners hire a qualified installer. The maker's manual provides instructions, but the actual work is often done by a dealer or certified installer. Ask about installation when you buy.